[esrauch]

If the 3d scan involved any creative input then it would also be protected. The sketch is understood to have your creative input applied to what you observed.

Consider maps: just accurately capture reality isn't copyrightable, if they have anything that was a creative decision then they do.

Maybe ironically the design and placement of the creative commons false inlay could be make the overall model copyrightable even if just the head part wasn't.